how to trouble shoot VPN client inability to create tunnel with firewall
We have ISP router> hq 2821 perimeter router>ASA5510 firewall. The firewall creates and breaks IPSEC tunnels. Cisco VPN Client was downloaded and installed on computers. The computers can ping outside interface of the ASA firewall, but can not create IPSEC tunnel. Any suggestion would help in troubleshooting.
Re: how to trouble shoot VPN client inability to create tunnel w
The following link has information on most common remote access VPN troubleshooting solutions. Give it a try and let us know if you are still having problems. Posting a sanitized copy of the ASA configuration would help.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...